Luigi: "Father, I want an annulment.
"Priest: "Why, Luigi? "
Luigi: "I think I married my sister.
"Priest: "No, no Luigi. I've known you and your wife all your lives, and there is no relation. What makes you think you've married your sister?
"Luigi: "Last night -- we undress for bed -- she look at me -- she say --"Oh, brother!"